The reaction between acetic anhydride and phosphoric acid
Now there is acetic anhydride, and when it encounters phosphoric acid, the phase of the two is a strange change.

Acetic anhydride is active in nature and has the ability to acyl groups. Phosphoric acid, a phosphorus-containing acid, has unique properties. When the two meet in a suitable place, the acyl group in acetic anhydride moves to phosphoric acid.

Its reaction is also, the acyl group enters the structure of phosphoric acid, which slightly changes the properties of phosphoric acid. Phosphoric acid is originally weakly acidic and reducing, and through this reaction, its properties are changed due to the entry of acyl groups.

This change is not only a change of matter, but also about chemistry. It can be seen that the change of chemistry is all-seeing due to the nature and encounter of things. Every reaction is a corner of the chemical mystery, waiting for our generation to explore the subtlety of chemistry.